# PrivateWave Professional vs D1 System

The clearest difference is review sentiment: D1 System at 50% against PrivateWave Professional's 33%. D1 System also leads on iOS requirement (8.0 vs 11.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PrivateWave Professional ships an update every 5 weeks, D1 System every 2 months. The most recent releases landed on September 22, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | PrivateWave Professional | D1 System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/privatewave-professional/id401908184/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 28 MB | 6 MB |
| Requires iOS | 11.0 | **8.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BV TECH SPA](https://appshunter.io/developer/1787905127) | [China Security & Fire IOT Sensing Co., Ltd.](https://appshunter.io/developer/914724038) |

## What reviewers say

### PrivateWave Professional

[App page](https://appshunter.io/ios/app/privatewave-professional/id401908184)

Securely encrypt your calls using VoIP technology. This app allows for encrypted communication between users who also have the software installed, offering robust security features and low bandwidth usage. It is designed for business and personal use where call privacy is paramount.

**Highlights:** End-to-end voice encryption (ZRTP), Signaling protection (SIP/TLS), Mutual authentication with X.509 certificates, Low bandwidth usage, Extremely low battery drain, Supports various IP-enabled networks

**In-app purchases:** none


### D1 System

[App page](https://appshunter.io/ios/app/d1-system/id914724035)

This app allows users to remotely manage an SMS alarm system. It enables sending text messages for home protection, configuring alarm host parameters, and setting zone and RFID card names. Users can also manage SMS codes.

**Highlights:** Send SMS for home protection, Configure alarm host parameters, Set zone names, Set RFID card names, Manage SMS codes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PrivateWave Professional free?

PrivateWave Professional is free to download, with no in-app purchases.

### Is D1 System free?

D1 System is free to download, with no in-app purchases.

### Do PrivateWave Professional or D1 System have ads?

Neither PrivateWave Professional nor D1 System shows ads.

### Which is updated more often, PrivateWave Professional or D1 System?

PrivateWave Professional ships an update every 5 weeks, and D1 System every 2 months. Most recently, PrivateWave Professional was updated on September 22, 2026 and D1 System on June 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*